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  1. #11
    Super Member crazyal's Avatar
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    Dec 2003
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    5,782
    Location
    Northern Vermont

    Default Re: Laser sight question.

    Never looking into how they work but we have laser curtains at work that stop any moving equipment if a person enters the restricted space. They get used anywhere there's contact between people and robots or other moving machinery. For example the silicon wafers get placed in a boat that holds 25 and that gets placed in a box while being moved from one location to another. Often times people will either place (or pick up) the boxes on a platform. The laser curtain will prevent the robot from touching the box as long as there's an arm or hand in the danger area. Otherwise they just have shields in place. Sets off all sorts of alarms so once people set the alarm off once they learn not to cross the line. Of course there's also the mandatory daily testing of the system. Years ago we had someone seriously hurt because someone defeated the system while working on it and accidentally forgot to reset it.
    Kubota L4240,Case 580K backhoe, Case 450 Dozer

  2. #12
    Veteran Member
    Join Date
    Jan 2006
    Posts
    1,026
    Location
    Mass, Northshore, Merrimack Valley
    Tractor
    B6100DT

    Default Re: Laser sight question.

    Quote Originally Posted by NorTracNY View Post

    The reflectance and scatter off of skin is very different compared to a piece of word.


    I bet it is!!!


    .
    Dan C.
    B6100DT, FEL, BH

  3. #13
    Gold Member
    Join Date
    Feb 2010
    Posts
    314
    Location
    Western NY

    Default Re: Laser sight question.

    Quote Originally Posted by Danno1 View Post
    I bet it is!!!


    .
    Sorry, I guess I wasn't clear. As an optical person, that is how I would imagine creating this type of safety device. You have a laser and detector(s) which would have calibration to know the difference between a piece of wood and human skin. I'd still be concerned about getting the accuracy good enough though.

  4. #14
    Platinum Member etcallhome's Avatar
    Join Date
    Mar 2005
    Posts
    653
    Location
    WV,Preston County
    Tractor
    JD 1026R

    Default Re: Laser sight question.

    I forget the name of the table saw , but if finger is detected near or about to hit blade , saw blade quits turning NOW... This came out about 3-5 yrs ago if I remember correctly. Sure beats loosing your fingers , a hand, or maybe your parts of your body if you fell across a running table saw blade.
    Have fun and be safe !!!

    JD1026R H120 fel w/54"bucket; 60" mmm ; 260 BH/w 12" bucket; ballast box; rear weights; front quick hitch w/angling kit and 54 " blade ;3pt rear 60" blade ; JD 47" frt snowblower ; Original Tractor Cab;Bush Hog 47" tiller and 15" Middle Buster

  5. #15
    Gold Member wyeguy's Avatar
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    Jun 2012
    Posts
    378
    Location
    Bartlett, Iowa
    Tractor
    Ford 1100

    Default

    Sawstop uses a small electrical current to detect flesh. It might cause a tiny nip, but fires a cartridge to drive a metal stop into the blade so fast, it won't draw blood. It destroys the blade, and is a one shot cartridge (you can replace), but look Ma! Ten fingers! I've heard that guys cutting fiberglass can cause the system to fire. Don't know nothin about laser systems.

  6. #16
    Veteran Member
    Join Date
    Jan 2006
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    Mass, Northshore, Merrimack Valley
    Tractor
    B6100DT

    Default Re: Laser sight question.

    Quote Originally Posted by wyeguy View Post
    Sawstop uses a small electrical current to detect flesh. It might cause a tiny nip, but fires a cartridge to drive a metal stop into the blade so fast, it won't draw blood. It destroys the blade, and is a one shot cartridge (you can replace), but look Ma! Ten fingers! I've heard that guys cutting fiberglass can cause the system to fire. Don't know nothin about laser systems.


    I believe Sawstop can also be triggered by wet PT wood.

    If you go to the Fine Woodworking website you can read for hours about SS, the inventor ( a laywer!), and a recent lawsuit.



    .
    Dan C.
    B6100DT, FEL, BH

  7. #17
    Elite Member schmism's Avatar
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    Jul 2006
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    4,829
    Location
    Peoria IL
    Tractor
    New holland TC(33)

    Default Re: Laser sight question.

    Quote Originally Posted by Danno1 View Post
    I believe Sawstop can also be triggered by wet PT wood.

    If you go to the Fine Woodworking website you can read for hours about SS, the inventor ( a laywer!), and a recent lawsuit.

    .
    so post the link and keep us have having to search for it!
    Steve - TC33D 4x4 FEL, dual rear remotes with toys

  8. #18
    Veteran Member
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    Jan 2006
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    Mass, Northshore, Merrimack Valley
    Tractor
    B6100DT

    Default Re: Laser sight question.

    Dan C.
    B6100DT, FEL, BH

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